Ubiquiti UniFi OS Server privileges management

Summaryinfo

A vulnerability was found in Ubiquiti UniFi OS Server, Cloud Keys, Network Video Recorders, Enterprise Network Video Recorders, Enterprise Network Attached Storage, Dream Machines, Enterprise Firewall Core, Dream Routers, Enterprise Fortress Gateway, Cloud Gateways, Dream Wall, Express 7 and Network Attached Storage. It has been rated as very critical. This impacts an unknown function. Performing a manipulation results in privileges management. This vulnerability is known as CVE-2026-77545. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Ubiquiti UniFi OS Server, Cloud Keys, Network Video Recorders, Enterprise Network Video Recorders, Enterprise Network Attached Storage, Dream Machines, Enterprise Firewall Core, Dream Routers, Enterprise Fortress Gateway, Cloud Gateways, Dream Wall, Express 7 and Network Attached Storage. It has been classified as very critical. This affects an unknown function. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A malicious actor with access to the network, low privileges and under certain conditions could exploit an Active Debug Code vulnerability found in certain devices running UniFi OS to escalate privileges within such UniFi OS devices or instances.

The advisory is shared at community.ui.com. This vulnerability is uniquely identified as CVE-2026-77545 since 08/20/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/26/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-66390). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Network Attached Storage Software

Vendor

• Ubiquiti

Name

• Cloud Gateways
• Cloud Keys
• Dream Machines
• Dream Routers
• Dream Wall
• Enterprise Firewall Core
• Enterprise Fortress Gateway
• Enterprise Network Attached Storage
• Enterprise Network Video Recorders
• Express 7
• Network Attached Storage
• Network Video Recorders
• UniFi OS Server

License

• commercial

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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